chrome/browser/policy/developer_tools_policy_handler.h

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_POLICY_DEVELOPER_TOOLS_POLICY_HANDLER_H_
#define CHROME_BROWSER_POLICY_DEVELOPER_TOOLS_POLICY_HANDLER_H_

#include "base/macros.h"
#include "components/policy/core/browser/configuration_policy_handler.h"

class PrefService;

namespace user_prefs {
class PrefRegistrySyncable;
}

namespace policy {

// Handles the DeveloperToolsDisabled and DeveloperToolsAvailability policies.
// Controls the managed values of the prefs |kDevToolsAvailability| and
// |kExtensionsUIDeveloperMode|.
class DeveloperToolsPolicyHandler : public ConfigurationPolicyHandler {
 public:
  DeveloperToolsPolicyHandler();
  ~DeveloperToolsPolicyHandler() override;

  // Developer tools availability as set by policy. The values must match the
  // 'DeveloperToolsAvailability' policy definition.
  enum class Availability {
    // Default: Developer tools are allowed, except for
    // force-installed extensions.
    kDisallowedForForceInstalledExtensions = 0,
    // Developer tools allowed in all contexts.
    kAllowed = 1,
    // Developer tools disallowed in all contexts.
    kDisallowed = 2,
    // Maximal valid value for range checking.
    kMaxValue = kDisallowed
  };

  // ConfigurationPolicyHandler methods:
  bool CheckPolicySettings(const policy::PolicyMap& policies,
                           policy::PolicyErrorMap* errors) override;
  void ApplyPolicySettings(const PolicyMap& policies,
                           PrefValueMap* prefs) override;

  // Registers the pref for policy-set developer tools availability in
  // |registry|.
  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);

  // Returns the current policy-set developer tools availability according to
  // the values in |pref_service|. If no policy mandating developer tools
  // availability is set, the default will be
  // |Availability::kDisallowedForForceInstalledExtensions|.
  static Availability GetDevToolsAvailability(const PrefService* pref_service);

  // Returns true if developer tools availability is set by an active policy in
  // |pref_service|.
  static bool IsDevToolsAvailabilitySetByPolicy(
      const PrefService* pref_service);

  // Returns the most restrictive availability within [|availability_1|,
  // |availability_2|].
  static Availability GetMostRestrictiveAvailability(
      Availability availability_1,
      Availability availability_2);

 private:
  DISALLOW_COPY_AND_ASSIGN(DeveloperToolsPolicyHandler);
};

}  // namespace policy

#endif  // CHROME_BROWSER_POLICY_DEVELOPER_TOOLS_POLICY_HANDLER_H_